Apparatus for forming rubber



UNITED sTATEsPATENr OFFICE.

THOMAS J. MAYALL, `or noXBuRY, MAssAoHUsE'r'rs.

APPARATUS ron romaine RUBBER BELTING. l

y Specification of Letters `Eatent No.` 26,608, dated December `21"?,11859. .i

To all whom 'it may concern: L

Be it known that I, THOMAS J. `Mmmm., of Roxbury, in the .county ofNorfolk and State of Massachusetts, have invented certain new and usefulImprovements in Machines for Makingv Rubber or Gutta-Percha Belting orBanding, and that `the following description, taken in connection withthe accompanying drawings hereinafter referred to, forms a full andexact specification of the same, wherein I have set fo-rth the natureand principles of my said improvements by which my invention may bedistinguished from all others of a similar class, together with suchparts as I claim and desire to have secured to me by Letters Patent.

The figures of the accompanying plate of drawings, represent myimprovements.

Figure l is a plan or top view of my new machine. Fig. 2 is a central,longitudinal vertical section of the same. Figs. 3, 4, and 5 aretransverse vertical sections taken respectively in the plane of thelines A, B, C, D, E, F.

In the manufacture of the ordinary rubber or gutta percha belting orbandingby hand, a sheet of rubber or gutta percha is first folded overthe fabric that forms the body of the belt, after the inner and outersheets have been cut to the required widths. But this mode occupies agreat deal ofv time and requires a considerable skill on the `part ofthe operatives. Machines have also been devised for accomplishing thisresult, but have not, previous to my invention, beensuccessful inproducing a perfect belt or band with rapidity and accuracy. By myinvention the folding of the outer sheet over the body or inner fabricof the belt or band and the forming of a true and even joint or seam isaccomplished accurately and with despatch by my machine, as is also thecutting of the outer and inner sheets into the desired strips forforming belts or bands of any required width. y

t a a in the drawings, represent the supporting framework of themachine. The sheet of wide rubber or gutta percha that is to form theoutside Z2 b b of the beltis wound either coated with cement or in asticky condition on one surface, together with cloth c c c, to preventthe adhesionof the surfaces upon a supply roll d, as is the case also inmaking belting by hand, and fedalongto twoy sets of revolving circularcutters e c, e c, which cut off from the wide sheet the neces- `beingsusceptibleof lateral adjustmentlon sary width to form theoutsidegof.the` belt, these cutters being `susceptible `:of ilateral ad` justmcnts`ontheir shafts f f, soithatwany de?. i sired widthof strip-canbecutiof.The@ L: maining portion of `the `wide. sheet is wtnind` up as fast asthe strip .iscutoif zuponja ,irollerjf i 3 g together .withasheet1ofclothliJ supplied byarolleri. y i 7e is a roller upon whichiswound the sheet `65 of rubber or gutta perchaofwhichthe inner i n.portion or body ofthe belt, is t0 becomposed, alternating with a sheetof cloth Z so 1 as to prevent the layersfrom; stickingto]` i gether,thecloth being supplied from a roll m and fed along to two sets ofrevolving ciri cular cutters It n n n, which cut off thexde`- Y siredwidth of stripforthe body of the belt,

their shafts o o. The remaining portionyof y this sheet i,s thelfwound`upon a roll `pto-.1 gether. with cloth g. 'Ihe` stripsyto forint innerand -i--outer' "portions of the fbelt`,. being thus cut off are thenfed` over the rolls 1U, the outside strip being the lower, and thence`1i` between two rollers `s s, which `unite the two l strips and causethem to adhere.; Thesheet` thus formed of the twostripsthen` passes `ibetween two rollers u and.)11,--Vthelowenkone c; Y V

having cams w lw, ,while the iupperjne w@ works between thecams upontheupper sur;` f face of the belt. By these` rollers u and/'v the f belt isturned/upgintofai gutter.. shape as"` "j shown in Figwgandfthencepassesto a roller@ l a2, having tw tapering `surfaces and athin: l circulardisk y, the""tapering surfacsof the" i roller serving to` complete theoverlapping or covering of the inner stripmy theouter y one. Theedges-arethen;broughtevenlyjtof i gether so as toform `a truelandevenyjointl and Aat the same time theibeltgis formed, by being drawndown, or `cramped partly y around therpiphery ofa roller ,the belt. i ybeing passed down in `nearly a vertical di` *y rection and afterwardpassing between two .100 pressure rollers a a. "This" mode of draw-` ingthe belt, brings theedges ofthe lap or l y 1 covering to a i close,weven joint, with` `the y. greatest accuracy. `The belt being thusrcom-`i pleted is then wound with a `sheet or stripjof flexible metal fbetween its layers, to give `it i. a smoothrsurface,upon1a receivingroll, gf "l upon which it is thenvulcanized, which icolnpletes theoperation. "l" 1 Having thus described my improvements, I shall statemyclaim as follows: 1

What I claim as my inventionand to have secured to me by Letters Patent,1s-

1. The use of the two rollers u and o acting together so as to form thebelt into a gutter shape, whereby the first step in the process offolding the outside sheet or covering of rubber or gutta percha over thebody or inner fabric ofthe belt or band is effected, as set forth.

2. The roller'm having two tapering surfaces and a central disk, wherebythe overlapping of the covering or outer sheet over the inner fabric iscompleted, and the edges of the outer sheet or covering brought to atrue and even line before being united.

3. Bringing the two edges of the outer sheet or covering evenly togetherso as to form a true and perfect joint and complete the formation of thebelt or band, by the employment of two or more rollers, arranged inrelation to each other, so that the said belt or band shall be drawnpartially around the periphery of either or all the said rollers,substantially in the manner as set forth.

4. In combination with the machinery for forming the belt or band Iclaim the devices for cutting both the outer and inner sheets intostrips of any desired width, as described.

W THOS. J. MAYALL.

Witnesses:

JOSEPH GAVETT, ALBERT W. BROWN.

